Legendary X-Men creators craft all-new, in-continuity stories set during their fan-favorite runs! Break out the yellows and blues, fire up the Danger Room and prepare for a return to the classic eras of the X-Men! Fabian Nicieza kicks things off with a special saga of Cyclops and Havok as the Shi'ar hunt the Forsaken One! When the Summers brothers search for answers, the full truth behind Adam-X's lineage is revealed in a story nearly 30 years in the making! Then, Louise and Walter Simonson once again pit the original X-Factor against their arch-nemesis Apocalypse — plus an unexpected face from the team's past! And Peter David returns to his fan-favorite team of Havok, Polaris, Wolfsbane, Strong Guy, Quicksilver and Madrox! Mutants have taken hostages at the Latverian Embassy, and the blame is falling on X-Factor!